What is the probability that a student can pass a 25-question multiple choice exam if each question has five choices and the student guesses?
Answer to relevant QuestionsWhat is the probability that in a sample of 20 tires one will be defective if 5% of all such tires produced at a particular plant are defective? Companies that sell mutual funds charge their investors expense fees to offset the costs of research and administration. The distribution of expense fees is normal, with a mean of 2.5% and a standard deviation of 1.0%. a. ...Over time, the owner of a bicycle store has come to the conclusion that about 3.2% of the customers who enter her store are prepared to purchase a new bicycle. What is the probability that one out of the 25 customers who ...The marks in an economics class are normally distributed, with a mean of 65% and a standard deviation of 12%. a. What percentage of the class passed (that is, received a mark of 50% or higher)? b. What percentage of the ...A survey by a research company reported that 40% of retired people eat out at least once a week. You run a restaurant, and you are wondering if you should focus more of your advertising on retired people. However, you are ...
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